不同药剂·方法和时间浸种对水稻恶苗病的防治效果

Efficacy of Seed Soaking with Different Fungicides,Time and Methods on Rice Bakanae Disease

[目的]研究不同药剂、方法和时间浸种对水稻恶苗病的防治效果.[方法]选择生产上常用及目前新上市的几种药剂,采取不同方式、时间等进行试验,以明确最佳药剂及处理方式.[结果]咪氰烯菌脂及其复配剂防效优异,浸种方法、时间与效果无明显相关性.咪鲜·杀螟丹日浸夜露法优于连续浸种法;24～60 h浸种时间延长,秧田期防效有升高趋势,但分蘖和灌浆期不明显.亮盾、适乐时与锐胜混用拌种,前期防效较高,但灌浆期（后期）效果下降.杀螟·乙蒜素防效一般.[结论]氰烯菌酯及其复配剂效果表现优异.

[Objective] The aim was to study efficacy of seed soaking with different fungicides,time and methods on rice bakanae disease. [ Method] Field experiment of seed soaking on rice bakanae disease with different fungicides,time and methods was carried out. [ Result] The results showed that the new fungicide Js399-19 had excellent effects on the disease and had no correlation with method and time of treatment. On the contrary, prochloraz and also its mixer with insecticides, the popular fungicide used by local famer had poor efficacy or even no effects at all. But the method with ＂day-soaking, night-exposure＂ and longer time of treatment showed the tread of better effects than method of ＂nonstop soaking ＂ and shorter time. The seed coating agents as fludioxonil or its mixer with metalaxyl-M also had good effects in seedling to tillering stage but poor effects at grain filling stage. [ Conclusion] The new fungicide Js399-19 had excellent effects on the disease.